判断TreeView中有没有值的方法

  ShowMessage(IntToStr(PrintTime_tree.SelectionCount));
  if PrintTime_tree.SelectionCount <> 0 then
  begin
    ShowMessage(IntToStr(PrintTime_tree.SelectionCount));
  end;

用PrintTime_tree.SelectionCount <> 0进行判断

不可用PrintTime_tree.Selected.Text进行判断，不信可以试下